Installation - Electrical
118 CLCH-SVX07K-EN
If not factory-installed, the electrical contractor must
provide and install a starter or starting contactor,
disconnect, fuses, etc., as required by local codes, for the
CDQ wheel motor. Do not install a variable frequency
drive (VFD) to control the desiccant wheel speed. This
may result in failure of the wheel motor. The motor
requires air movement for continuous operation.
Operating the wheel for long periods with the fan off may
result in motor failure.
Optional Damper Actuators
Each actuator requires 24 Vac supply power and wiring for
the 2–10 Vdc control signal. This wiring should be sized
and installed as required per national and local electrical
codes.
Optional Air Temperature Sensors
If not factory-wired, connection to the air temperature
sensors is made by penetrating through the side of the
module wall and making electrical connections to the
temperature sensor. Nominal resistance of these sensors
is 1,000 ohms at 32 degrees F (0 degrees C). The sensor is
a thermistor with a platinum 375 resistance curve. This
wiring should be sized and installed as required per
national and local electrical codes.
Table 37. CDQ motor data
Wheel Size
(nominal cfm) HP Voltage/phase HZ Full Load Amps Rotation RPM Rotation Direction
500-5000 1/80 115 Volt Single Phase 60 0.3 2.30 CW/CCW*
6000-40,000 1/80 115 Volt Single Phase 60 0.3 4.50 CW/CCW*
Note: *Motors are wired for counter-clockwise rotation
Figure 154. CDQ motor wiring
Red
BlackBlack
White
Green
Black
Red Black
White
Green
MM
5000C 1 wheels and below
≤48 in. diameter
6000C1 wheels and above
≥54 in. diameter
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